JP2005091785A - Medium for judging authenticity, medium label for judging authenticity, medium transfer sheet for judging authenticity, sheet capable of judging authenticity and information recording body capable of judging authenticity - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a medium for judging authenticity capable of eliminating problems that it is difficult to shorten manufacturing time and that it is difficult to change the pattern of a decision part because many stages are required at the time of manufacturing an embossing mold in the case of forming the decision part by embossed hologram. <P>SOLUTION: By laminating an oriented film 3 and a light selective reflection pattern layer 4 composed of cholesteric liquid crystal layer on a base material 2, authenticity judgement using right-handed circularly polarized light and left-handed circularly polarized light is realized. It is conceivable to obtain the pattern layer 4 by overprinting of two or more colors, one color of which can be made a uniform and even layer. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

    The present invention relates to a medium for authenticity determination that can be distinguished from those obtained by forgery or falsification based on unauthorized intentions. The present invention also relates to such a medium for authenticity determination processed into a label form or transfer sheet form suitable for application to an article. Furthermore, the present invention also relates to a sheet and an information recording body to which the authenticity determination medium is applied.

    For example, credit cards, deposit and saving cards, various types of cash vouchers, or identification cards, etc., cause various troubles if they are counterfeited or tampered with and used illegally, so in order to prevent damage caused by forgery or tampering It is desirable to have a function that can identify the authenticity of each. In addition, for example, luxury products such as wristwatches, leather products, precious metal products or jewelry, in particular, what are said to be luxury brand products, audio products, electrical appliances, music software recorded on media, video software, game software, Alternatively, computer software is also subject to counterfeiting, and similarly, it is desirable to have a function that can identify authenticity.

  Conventionally, holograms are frequently used for the purpose of enabling authenticity identification of various articles including the above-mentioned articles. This is because the hologram has manufacturing difficulties due to the precision of its structure. However, the method of manufacturing a hologram is known to experts, and since it is precise, it is difficult to distinguish between a genuine hologram and a forged hologram.

Therefore, as a substitute for the hologram, a base material and a light selective reflection layer that is formed on one surface of the base material and reflects only one of the left-hand polarized light and the right-hand polarized light among the incident light. And a true / false determination body having a determination unit that includes determination information for determining a new product, which is formed on at least a part of the light selective reflection layer (see, for example, Patent Document 1).
JP 2000-25373 A (page 3-5, FIG. 1).

  In the authenticity determination body described in Patent Document 1, the determination part is still formed of an embossed hologram, and although it is possible to form a precise pattern as the determination part, the unevenness of the hologram engraved in the embossed shape is sufficient. In order to reproduce, it is necessary to sufficiently increase the contact time between the embossing mold and the material to be embossed, and it is difficult to shorten the manufacturing time, and the manufacturing process of the embossing mold itself has many steps. There is also a disadvantage that it is difficult to change the pattern.

  The problem of the present invention is that it is difficult to shorten the manufacturing time when forming the determination part with an embossed hologram, and there are many steps during the manufacture of the emboss mold, and it is difficult to change the pattern of the determination part. It is an object of the present invention to provide a true / false determination medium that can eliminate the above-mentioned problem.

  It has been found that the above-described problems of the present invention can be solved by, for example, forming a layer having light selective reflectivity composed of cholesteric liquid crystal in a pattern, and the present invention is reached based on this. I was able to.

  1st invention which solves a subject is a light selective reflection pattern which consists of a layer of the material which has light selective reflectivity which reflects either left circularly polarized light or right circularly polarized light among incident light on the surface of a substrate. The present invention relates to an authenticity determination medium characterized in that layers are laminated.

  The second invention relates to a medium for authenticity determination according to the first invention, wherein the material having selective light reflectivity is a cholesteric liquid crystal.

  A third invention relates to a medium for authenticity determination according to the first or second invention, wherein two or more kinds of different colors are laminated as the light selective reflection pattern layer.

  A fourth invention relates to a medium for authenticity determination according to the third invention, wherein at least one of the light selective reflection pattern layers is a uniform and uniform layer.

  A fifth invention relates to a medium label for authenticity determination, wherein an adhesive layer is further laminated on the medium for authenticity determination of any one of the first to fourth inventions.

  The sixth invention relates to a medium transfer sheet for authenticity determination, wherein the authenticity determination medium of any one of the first to fourth inventions is laminated on a peelable surface of a peelable substrate. is there.

  7th invention relates to the sheet | seat which can authenticate authenticity characterized by having the authenticity determination medium of any one of 1st-4th invention visibly in a part of sheet | seat.

  According to an eighth aspect of the present invention, the authenticity determination medium of any of the first to fourth aspects is laminated on the surface of an information recording body that is an authenticity determination target or is visible on a part of the information recording body. The present invention relates to an information recording body capable of authenticity determination.

  According to the first invention, the light selective reflection pattern layer appears more clearly by irradiating one of the left circularly polarized light and the right circularly polarized light, and becomes invisible by irradiating the other, Since the selective reflection pattern layer can be easily formed by, for example, printing or the like, it is possible to provide a true / false determination medium that does not increase the number of manufacturing steps and can easily change the pattern.

  According to the second invention, in addition to the effect of the invention of claim 1, since the light selective reflection pattern layer is made of a cholesteric liquid crystal layer, the medium for authenticity determination having uniform and high reflectivity in each part of the light selective reflection pattern layer Can be provided.

  According to the third aspect, since two or more kinds of different colors are laminated as the light selective reflection pattern layer, it is possible to provide a true / false determination medium capable of giving a more complicated visible pattern.

  According to the fourth invention, in addition to the effect of the invention of the third aspect, it is possible to provide a true / false determination medium capable of providing a visible pattern with a uniform and uniform background color.

  According to the invention of claim 5, the medium for authenticity determination capable of exerting the effect of the invention of any one of claims 1 to 4 can be easily applied to an article using an adhesive layer. A media label can be provided.

  According to the invention of claim 6, since the authenticity determination medium capable of exhibiting the effects of any of claims 1 to 4 is configured to be transferable, the authenticity that can be easily applied to an article A medium transfer sheet for determination can be provided.

  According to the invention of claim 7, since the medium for authenticity determination of any one of claims 1 to 4 is applied, it is possible to determine whether the information to be added is true or false. Sheets can be provided.

  According to the invention of claim 8, since the authenticity determination medium according to any one of claims 1 to 4 is applied, information recording capable of authenticity determination enabling self-authentication determination is possible. The body can be provided.

  As illustrated in FIG. 1A, in the authenticity determination medium 1 of the present invention, an alignment film 3 is laminated on the upper surface of the substrate 2 in the drawing, and light selective reflection is performed on the alignment film 3. The pattern layer 4 is laminated. The light selective reflection pattern layer 4 is a layer made of a material having a light selective reflection property that reflects either left circularly polarized light or right circularly polarized light in incident light, and is made of, for example, a cholesteric liquid crystal layer, and whether or not there is a layer. It is what makes the pattern by. A pattern can also be formed by the thickness of the layer.

  As illustrated in FIG. 1B, in the authenticity determination medium 1 of the present invention, the light selective reflection pattern layer 4 includes two types of light selective reflection pattern layers, that is, the light selective reflection pattern layer A (reference numeral; 4a) and the light selective reflection pattern layer B (sign; 4b) may be used. The two types of light selective reflection pattern layers, that is, the light selective reflection pattern layer A (symbol; 4a) and the light selective reflection pattern layer B (symbol; 4b) are made of the same material and have different thicknesses, or There are some differences such as different materials. Thus, except that the light selective reflection pattern layer 4 is composed of two layers, the laminated state of the substrate 2, the alignment film 3, and the light selective reflection pattern layer 4 is the same as described with reference to FIG. It is. In FIG. 1B, the light selective reflection pattern layer A (symbol; 4a) and the light selective reflection pattern layer B (symbol; 4b) are different in thickness for the sake of distinction in the figure. The thickness may be the same.

  As shown in FIG. 2A, in the authenticity determination medium 1 of the present invention, the light selective reflection pattern layer 4 includes the light selective reflection pattern layer A (symbol: 4a) and the uniform one from the alignment film 3 side. Such a light selective reflection pattern layer B (symbol: 4b) may be laminated in order. Alternatively, as shown in FIG. 2B, in the authenticity determination medium 1 of the present invention, the light selective reflection pattern layer 4 is uniform and uniform from the alignment film 3 side. 4b) and the light selective reflection pattern layer A (symbol; 4a) may be laminated in order. In other words, the light selective reflection layer A (symbol: 4a) having a pattern depending on the presence or absence of a layer or a thin film and the uniform and uniform light selective reflection pattern layer B (symbol; 4b) are laminated on the alignment film 3 in any order. It may be. 2A and 2B, the laminated state of the substrate 2, the alignment film 3, and the light selective reflection pattern layer 4 is shown in FIG. 1A. This is the same as described above.

  In the examples described with reference to FIG. 1 and FIG. 2, both of them show an alignment film 3 different from the base material 2, but when the stretched plastic sheet is used as the base material 2, Since the surface has orientation, the lamination of the alignment film 3 can be omitted. When two or more light selective reflection pattern layers are provided, an alignment film may be provided between the light selective reflection pattern layers as necessary.

  As the base material 2, it is possible to reduce the thickness, and it is preferable to have a solvent resistance and a heat resistance that can withstand the processing when manufacturing the medium for mechanical strength and authenticity determination. Since it depends on the purpose of use, it is not limited, but a film-like or sheet-like plastic is preferable. For example, various plastic films such as polyethylene terephthalate (PET), polycarbonate, polyvinyl alcohol, polysulfone, polyethylene, polypropylene, polystyrene, polyarylate, triacetyl cellulose (TAC), diacetyl cellulose, and polyethylene / vinyl alcohol can be exemplified. .

  The alignment film 3 may be any one as long as it can be generally used as an alignment film, such as polyvinyl alcohol resin (PVA) or polyimide resin. The alignment film 3 is formed by applying a solvent solution of these resins to the surface of the substrate 2 as described above by an appropriate application method and drying, followed by rubbing with a cloth, a brush, or the like. To do. When two or more light selective reflection pattern layers are provided, an alignment film provided as necessary between the light selective reflection pattern layers can be formed in the same manner.

  The light selective reflection pattern layer 4 is composed of a cholesteric liquid crystal layer. The cholesteric liquid crystal layer in the aligned state has a property of reflecting only one of left circularly polarized light and right circularly polarized light in incident light. The light selective reflection pattern layer 4 can be formed by applying a solvent solution of cholesteric liquid crystal in a pattern and drying it. Alternatively, at this time, an ultraviolet polymerizable composition is prepared using a polymerizable cholesteric liquid crystal. It can be used as a pattern, and after drying, it can be formed by irradiating with ultraviolet rays for polymerization.

  In order to form the light selective reflection pattern layer 4 in a pattern, it is preferable to use various printing methods. When two or more light selective reflection pattern layers 4 are provided, at least one of them is uniform. In order to form a uniform layer, it is preferable to use various coating methods.

  The authenticity determination method will be described using the authenticity determination medium 1 described with reference to FIG. As schematically shown in FIG. 3A, first, when the authenticity determination medium 1 of the present invention is observed under natural light, the pattern of the light selective reflection pattern layer 4 (here, the letter “A”). ) 5 is visible even under natural light. Here, if the light selective reflection pattern layer 4 has the property of reflecting only the right circularly polarized light, when the right circularly polarized light is incident on the light selective reflection pattern layer 4, reflection occurs at the portion of the letter “A”. , The letter “A” causes a difference in reflectivity from the surroundings, and is colored based on the helical pitch of the cholesteric liquid crystal constituting the light selective reflection pattern layer 4, so that it is more than under natural light. A clear pattern 5 ′ is given (FIG. 3B). However, when the left circularly polarized light is incident on the light selective reflection pattern layer 4, the left circularly polarized light is not reflected. Therefore, neither the letter “A” nor any part of the background is dark, and the pattern 5 cannot be seen at all. .

  Also in the case of the authenticity determination medium 1 described with reference to FIG. 1B, the pattern is still visible under natural light, but the light selective reflection pattern layer A (symbol: 4a) and the light selective reflection are used. If each of the pattern layers B (symbol; 4b) has a property of reflecting only the right circularly polarized light, when the right circularly polarized light is incident on the light selective reflection pattern layer 4, the light selective reflection pattern layer A (symbol; 4a). ) And the light selective reflection pattern layer B (sign; 4b) are reflected and moreover colored by different colors based on the helical pitch of the cholesteric liquid crystal constituting each layer, than in natural light. It looks clear and no pattern is visible when left circularly polarized light is incident.

  Alternatively, in the case of the authenticity determination medium 1 described with reference to FIG. 1B, the light selective reflection pattern layer A (symbol: 4a) has a property of reflecting only the right circularly polarized light, and the light selective reflection. If the pattern layer B (symbol: 4B) is configured to reflect only the left circularly polarized light, both the light selective reflection pattern layer A and the light selective reflection pattern layer B are visible with natural light. When the right circularly polarized light is incident on the light selective reflection pattern layer 4, only the light selective reflection pattern layer A (symbol; 4a) is visualized, and when the left circularly polarized light is incident, the light selective reflection pattern layer B (symbol; 4b) is visualized. ) Only can be visualized.

  Also in the case of the authenticity determination medium 1 described with reference to FIG. 2, the pattern can be visually recognized under natural light, but the light selective reflection pattern layer A (symbol: 4a) and the uniform and uniform light. When the selective reflection pattern layer B (symbol; 4b) has a property of reflecting only the right circularly polarized light, when the right circularly polarized light is incident on the light selective reflection pattern layer 4, the light selective reflection pattern layer A (symbol; 4a) and the light selective reflection pattern layer B (sign; 4b) are both colored by reflection and different colors based on the helical pitch of the cholesteric liquid crystal constituting each layer, rather than under natural light. When the pattern appears more clearly and left circularly polarized light is incident, the pattern is not visible.

  Further, in the case of the authenticity determination medium 1 described with reference to FIG. 2, the light selective reflection pattern layer A (symbol: 4a) reflects only the right circularly polarized light, and uniform and uniform light. If the selective reflection pattern layer B (sign; 4b) is configured to reflect only the left circularly polarized light, when the right circularly polarized light is incident on the light selective reflection pattern layer 4, the light selective reflection pattern layer A ( Only the sign; 4a) is visualized by reflection and coloring, and when the left circularly polarized light is incident, only the uniform uniform light selective reflection pattern layer B (sign; 4b) is visualized by reflection and coloring. You can also.

  Therefore, the authenticity determination medium 1 of the present invention in which the light selective reflection pattern layer 4 is laminated exhibits different reflectivity under the natural light and when the right circularly polarized light and the left circularly polarized light are separately incident. Since it looks different from the observer's point of view, it is necessary to confirm the appearance of the authentic thing in advance and determine whether the right circularly polarized light and the left circularly polarized light are genuine or true. The true / false determination can be made by comparing the reflection or appearance by entering both. Note that the observation of the right circularly polarized light or the left circularly polarized light incident on the light selective reflection pattern layer 4 is simply performed by superimposing the right circularly polarizing plate or the left circularly polarizing plate on the light selective reflection pattern layer 4. It may be.

  The authenticity determination medium 1 of the present invention described with reference to FIG. 1 and FIG. 2 is processed into a label or transfer sheet form as described below with reference to FIG. Application to various articles to which the medium 1 is applied can be facilitated.

  FIG. 4A relates to the form of the label. The example shown in the figure is the light selective reflection pattern layer 4 side of the authenticity determination medium 1 having a laminated structure of the base material 2 and the light selective reflection pattern layer 4. The medium layer 11 for authenticity determination is configured by laminating an adhesive layer 6 on the medium. The authenticity determination medium 1 for constituting the authenticity determination medium label 11 is not limited to the above-described laminated structure, but various laminated structures described with reference to FIG. 1 or FIG. It may have a laminated structure in which the alignment film 3 is omitted.

  4A, the adhesive layer 6 is laminated on the light selective reflection pattern layer 4 side. However, the adhesive layer may be laminated on the substrate 2 side. The side on which the adhesive layer is laminated is determined depending on which of the light selective reflection pattern layer 4 side and the substrate 2 side becomes the incident surface when labels are applied to various articles. When the authenticity determination medium 1 is configured using a base material that requires the alignment film 3 such as a triacetylcellulose film, in order to see the latent image as described above, Alternatively, the left circularly polarized light may be incident from the light selective reflection pattern layer 4 side or from the base material 2 side, but the surface has orientation as in the case of a polyethylene terephthalate resin film or a polycarbonate resin film. When configured using a base material that does not require a film, it is necessary to make right circularly polarized light or left circularly polarized light incident from the light selective reflection pattern layer 4 side. In addition, when the adhesive bond layer is laminated | stacked on the base material 2 side, you may laminate | stack a protective layer on the light selective reflection pattern layer 4 side. The adhesive layer 6 can be various types of adhesive layers, but is preferably a heat-sensitive adhesive layer or a pressure-sensitive adhesive layer.

  FIG. 4B relates to the form of the transfer sheet. In the illustrated example, the light selective reflection pattern layer 4 of the authenticity determination medium 1 having a laminated structure of the base material 2 and the light selective reflection pattern layer 4 is shown. The authenticity determination medium transfer sheet 12 is configured by laminating the adhesive layer 6 on the side and laminating the peelable surface 7a of the peelable substrate 7 on the substrate 2 side. The authenticity determination medium 1 for constituting the authenticity determination medium transfer sheet 12 is not limited to the laminated structure described above, but various laminated structures described with reference to FIG. 1 or FIG. It may have a laminated structure in which the alignment film 3 is omitted.

Also in the case of the authenticity determination medium transfer sheet 12, which side the adhesive layer is laminated on is determined by:
When the transfer sheet is applied to various articles, it is determined depending on which of the light selective reflection pattern layer 4 side and the base material 2 side becomes the incident surface, and the peelable base material 2 is laminated on the side where the adhesive layer is not laminated. To do. Again, the adhesive layer 6 can be various types of adhesive layers, but is preferably a heat-sensitive adhesive layer or a pressure-sensitive adhesive layer. The adhesive layer may be applied to the surface of various articles to which the authenticity determination medium 1 should be applied, and the transfer sheet may be configured without an adhesive layer.

  The authenticity determination medium 1 of the present invention is preferably a variety of articles using the authenticity determination medium label 11 or the authenticity determination medium transfer sheet 12 as described above. Can be applied to. The authenticity determination medium label 11 is applied by adhering the adhesive layer 6 toward the article to be adhered, and the authenticity determination medium transfer sheet 12 is used. Then, after the adhesive layer 6 is adhered toward the article serving as the adherend, it is applied by peeling off the peelable substrate 7.

  FIG. 5 is a diagram for explaining application of the authenticity determination medium 1 mainly for a sheet-like object. What is shown in FIG. 5A is an information recording body 21 capable of authenticating authenticity, in which the authenticity determination medium 1 is laminated on a part of the surface of the information recording body 8. The information recording body 8 is a sheet-like material whose base material is paper or plastic sheet. In the example shown in the figure, information 9 such as the amount of money to be used as a voucher, the name of the issuing company, letters such as a cautionary note, or a coloring pattern. Is formed and recorded by means such as printing.

  In FIG. 5B, the authenticity determination medium 1 is built in a sheet-like material in advance so as to be visible, and is a recessed opening that does not become a through-hole in paper or a plastic sheet. 10 is configured so that the authenticity determination medium 1 can be seen from the opening 10, and the authenticity determination medium 1 has a very narrow width of about 0.5 mm to 5 mm as an example in order to facilitate application. In the case of paper, in the case of paper, when laminating several layers constituting the paper, an opening 10 is provided in the layer constituting the surface layer, and the sheet-like material is cut. It is formed by applying a thread-like authenticity determination medium 1 between layers. If necessary, the thread-like authenticity determination medium 1 is colored with a dark color or the like on one side of the base material for the purpose of improving the visibility when irradiated with circularly polarized light, and is incorporated in a sheet-like material. In order to ensure the adhesiveness between the thread-like authenticity determination medium 1 and the sheet-like material in a state where the adhesive is used, an adhesive layer, preferably a heat-sensitive adhesive layer, may be laminated on one side or both sides. Such a sheet-like material to which the authenticity determination medium 1 is applied is suitable for use in an information recording body, in particular, a printed matter having a cash voucher or other economic value.

  A TAC film is prepared, and a PVA solution (PVA resin manufactured by Kuraray Co., Ltd., product number: “110”, used as a 5% aqueous solution (transparent)) is applied to the surface and dried, followed by rubbing treatment. An alignment film was formed. Subsequently, gravure printing is performed on the alignment film using polymerizable cholesteric liquid crystal ink, dried, and then irradiated with ultraviolet rays to form letters and designs to obtain a printed film (authentication medium). It was. The polymerizable cholesteric liquid crystal ink used here is a nematic liquid crystal (manufactured by BASF Corp., trade name: “Palio Color LC242”), a chiral agent (manufactured by BASF Corp., trade name: “Palio Color LC756”) and ultraviolet rays. This is a 15% solution containing a polymerization initiator (solvents are toluene and methyl ethyl ketone). Among them, the mixing ratio of polymerizable nematic liquid crystal / chiral agent is 95.5 / 4.5, and UV polymerization is performed. The initiator is a blend of 5% with respect to the polymerizable nematic liquid crystal.

  In the obtained printed film, characters and designs printed under natural light were visible, but when the right circular polarizing plate was stacked on the TAC film side, the printed characters and designs were highly reflective, Moreover, by coloring, it appeared more clearly than under natural light. When the left circular polarizing plate was overlapped instead of the right circular polarizing plate, the whole was dark and the printed characters and designs were not visible. Moreover, the same result was obtained even when the right circularly polarizing plate or the left circularly polarizing plate was stacked on the printed surface side.

  As in Example 1, except that two types of inks having different ratios of nematic liquid crystal and chiral agent were used as the polymerizable cholesteric liquid crystal ink, printing was performed in two colors to obtain a printing film. In the obtained printed film, the printed characters and designs were visible, but when the right circular polarizing plate was superimposed on the TAC film side, the printed characters and designs were highly reflective, By coloring it in a different color, it appears clearer than under natural light, and when the left circular polarizing plate is superimposed instead of the right circular polarizing plate, the whole becomes dark and the printed letters and designs are visible There wasn't. Moreover, the same result was obtained even when the right circularly polarizing plate or the left circularly polarizing plate was stacked on the printed surface side.

  As in Example 2, except that characters and designs are printed with the first color and solid printing (uniform uniform printing) is performed with the second color to form a solid layer. A printed film was obtained. In the obtained printed film, characters and designs with a solid layer in the background were visible, but when the right circularly polarizing plate was placed on the TAC film side, the printed characters and designs and the solid layer had reflectivity. Also, by coloring in two different colors, it looks clearer than in natural light, and when the left circular polarizing plate is overlapped instead of the right circular polarizing plate, the whole becomes dark color and printed characters and The design and the solid layer were not visible. Moreover, the same result was obtained even when the right circularly polarizing plate or the left circularly polarizing plate was stacked on the printed surface side.

  A PET film was prepared as a substrate, and a printing film was obtained in the same manner as in Example 2 except that the alignment film was not formed. The obtained printed film was visible under natural light, and any characters and designs were visible, but when the right circularly polarizing plate was superimposed on the printed surface side, it was printed in the same manner as the printed film obtained in Example 2. The letters and designs are highly reflective and appear to be clarified by coloring them in two different colors. When the left circular polarizing plate is superimposed instead of the right circular polarizing plate, the entire character becomes dark and printed. And the design was not visible. In addition, even when the right circularly polarizing plate or the left circularly polarized light was overlapped on the base material side, the difference in appearance did not occur as in the case of overlapping on the printing surface side.

It is a figure which shows the example of the laminated structure of the medium for authenticity determination of this invention. It is a figure which shows the other example of the laminated structure of the medium for authenticity determination of this invention. It is a figure which shows the authenticity determination method using the authenticity determination medium of this invention. It is a figure which shows the label and transfer sheet | seat suitable for applying the authenticity determination medium of this invention to various articles | goods. It is a figure which shows the example of application of the medium for authenticity determination of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Medium for authenticity determination 2 ... Base material 3 ... Orientation film 4 ... Light selective reflection pattern layer 6 ... Adhesive layer 7 ... Release substrate (7a; Release surface)
8 ... Information recording body 9 ... Information 10 ... Opening 11 ... Authenticity judgment medium label 12 ... Authenticity judgment medium transfer sheet 21 ... Authenticity judgment information recording body 22 ... Authenticity Judgable sheet

Claims (8)

  A light selective reflection pattern layer composed of a layer of a material having light selective reflectivity that reflects either left circularly polarized light or right circularly polarized light of incident light is laminated on the surface of the substrate. A medium for authenticity determination.   2. The medium for authenticity determination according to claim 1, wherein the light selective reflection material is cholesteric liquid crystal.   The authenticity determination medium according to claim 1 or 2, wherein two or more kinds of different colors are laminated as the light selective reflection pattern layer.   4. The medium for authenticity determination according to claim 3, wherein at least one of the light selective reflection pattern layers is a uniform and uniform layer. An authenticity determination medium label, wherein an adhesive layer is further laminated on the authenticity determination medium according to claim 1. An authenticity determination medium transfer sheet, wherein the authenticity determination medium according to any one of claims 1 to 4 is laminated on a releasable surface of a releasable substrate. A sheet capable of authenticity determination, comprising the medium for authenticity determination according to any one of claims 1 to 4 so as to be visible in a part of the sheet. The authenticity determination medium according to any one of claims 1 to 4 is laminated on a surface of an information recording body which is an object of authenticity determination, or is visible on a part of the information recording body. An information recording medium that can determine authenticity.

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